Gas-engine



' J. WOLF.

GAS ENGINE.

APPLICATION FILED OCT. 11, 1919.

Patented Sept. 13, 1921.

' FIG. 1

WITNESSES.

' INVENTOL? f t "4. /MLM7/ 0.24 ATTOPNEXQ- UNITED STATES JACOB WOLF, OF MILWAUKEE, WISCONSIN.

GAS-ENGINE.

To all whom it may concern:

Be it known that I, JACOB WOLF, a subject of Austria-Hungary, residing at #1493 17th St., in the city and county of Milwaukee, State of Wisconsin, have invented new and useful Improvements in Gas-Engines,

of which the following is a specification.

The invention relates to a two piston internal combustion engine operating on the four stroke cycle.

The object of this invention is to produce a two piston four cycle engine of simple construction and high efliciency. Since with a two piston engine the use of cylinder heads is obviated less heat is lost to the jacket and ghei cylinder construction is greatly simpli- The invention further consists in the several features hereinafter described and more particularly defined by' claims at the conclusion hereof.

In the drawings: Figure 1 is an elevation view of an internal combustion engine embodying the invention; Fig. 2 is a horizontal sectional view through the engine; 'Fig. 3 is a detail sectional view taken on the line 3-3 of Fig. 2.

In the drawings, the numeral 4 designates the frame, 5 the crank shaft carrying flywheel 6 and drive pulley 7, and 8 the cylinder.

The cylinder 8 has a flanged portion 10 mounted on the frame and secured thereto by bolts 11, and a water jacket 12 which is formed in one with a cooling hopper 13.

I The cylinder 8 has a bore 14 extending therethrough and open at its ends and pistons 15 move in opposite directions within the bore.

One of the pistons 15 is operatively connected by a connecting rod 16 to one of the cranks 17 of the shaft 5, and the other piston is connected by a connecting rod 18 to a shaft 19 carried at the upper end of a lever;

Specification of Letters Patent.

' Patented Sept. 13, 1921.

Application filed October 11, 1919. Serial No. 330,145.

strokes, the pistons forming with the cylinder a combustion chamber 8'.

A port 24 in the cylinder communicates with a chamber 25 in a valve box 26. This box 26 has inlet and exhaust ports controlled by valves 27 and 28 respectively, so that the explosive mixture may be drawn into the cylinder through said chamber 25 and port 24, and so that the products of combustion may be expelled from the cylinder.

The inlet valve 27 and exhaust Valve 28 are operated in proper timed relation by cams 29 and 30 respectively mountedon a lay shaft 31 driven at half engine speed by the gears 32 and 33, as is usual in four cycle engines.

The mixture from a carburetor or other mlxing device 34passes through the cylinder pipe 35 into the chamber 25 and'cylinder, the supply of mixture bei-ng regulated by a throttle 36 operatively connected with a governor 37 driven from the shaft 31 by a gearing connection 38. In the present in- .stance a member 39 moved by the governor is connected to an arm 40 on the throttle valve to regulate the position of the throttle I in accordance with the operation of the governor. It will be understood that other methods ofgoverning may be employed if desired. 1

The fuel is supplied to thecarbureter or mixer 34 through a pipe 41 connected with a pump 42, the plunger 43of which is driven from the lay shaft 31 by an eccentric strap 44 connected with the plunger and surrounding an eccentric on said shaft.

Ignition of the charge may be accomplished in any of the well known ways, and for the purpose of illustration I have shown a battery ignition system including a timer 45 on the shaft 31 and a spark plug 46 mounted in the chamber 25. The valve box 26 is provided with a water jacket 47 connected to the hopper 13 by a pipe 48.

During the suction stroke, while the pistons 15 are moving outwardly and the inlet valve 27 is open, the explosivemixture isdrawn from the carbureter into the cylinder. On the succeeding in stroke or compression stroke the charge is compressed and ignited just before the pistons reach the end of their inward movement and on the succeedingstroke the energy of the gases expanding in the cylinder drives the piston outwardly, which through the connections previously described'causes rotation of the shaft 5. On the succeeding in stroke the exhaust valve is open and the products of combustion are expelled from the cylinder.

I desire it to be understood that this invention is not limited to any specific form or arrangement of parts except in so far as such limitations are specified in the claims. What I claim as my invention is: 1. In a two piston internal combustion engine, the combination, with a base frame, of a cylinder having a bore open at both ends,

two pistons working in said bore in opposite directions and forming a combustion chamber therewith, a cranked shaft having opa connecting rod connecting said wrist pin with the other crank.

2. In a two piston internal combustion engine, the combination with a base frame, of a cylinder having a bore open at both ends, two pistons working in said bore in opposite directions and forming a combustion chamber therewith, a cranked shaft having opposed cranks disposed between its bearings on said frame, a connecting rod connecting one of said pistons to one of the cranks, a beam pivotally mounted at its lower end on said frame and having a forked upper end, a wrist pin carried in the forked arms of said beam and extending beyond one of said arms, a connecting rod connected to the other piston and that portion of the wrist pin between the arms, and a connecting rod connecting the extended end of said wrist pin with the other crank.

JACOB WOLF. 

